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Underwater Acoustic Transducers
Passive Acoustic Surveillance and Scientific Monitoring
Active Sonar
Acoustic Navigation and Positioning
Acoustic Communication
Calibration, Self Noise, and Radiated Acoustic Signatures
Buoy and Mooring Sensor and Data Acquistion Systems
Acoustic Arrays
Custom Design and Fabrication
Acoustic Noise Floor Test Facility
Custom Design and Fabrication
APS' staff of electrical and mechanical engineers have extensive experience in the design and fabrication of turnkey electromechanical systems. We have produced a variety of custom designed and fabricated systems for unique applications, including pressure test vessels and positioning systems for acoustic testing.

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APS/C&M has designed and fabricated a number of pressure test vessels for unique applications including hydrostatic testing, and pressure and temperature cycling.

APS designed and fabricated  a custom pressure test vessel for testing of components to 300 psi for a customer in industry. The pressure tank consists of an aluminum vessel, an air-powered hydraulic pump, a water reservoir, a relief and vent valve, air supply valve, tubing, fittings, and an electronic control unit mounted on a movable cart.  The purpose of the tank is to provide a convenient method to test products at different static pressures.  The pressure tank consists of a 48"-long, 6"-diameter aluminum pipe with machined ends.  The end-caps seal the tank with a radial o-ring.  Four threaded steel rods are used to secure the end-caps.  This design allows for axial expansion of the tank which may otherwise be a problem for face seals.  Test articles are loaded into the top of the tank with the end-cap hinged open.  The end-cap is then swung back over onto the top of the tank and secured for testing with wing-nuts. Test pressures are entered using the electronic control unit.

We designed and fabricated a small portable pressure vessel to perform hydrostatic pressure testing of explosive devices at pressures to 300 psig for NSWC Crane Division. The vessel was designed and tested in accordance with the ASME Pressure Vessel Code. A counter weighted locking ring cover permits ease of access. After a test item is loaded and the tank is filled with water, it is pressurized with dry nitrogen. Through use of a PID loop controller and an accurate, tank mounted pressure transducer, pressure ramp rates of between 10 psi per min. and 300 psi per min. can be selected.
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